Improves fnc_doGroupAssault (#385)

* Improves fnc_doGroupAssault

Improves how AI groups clear buildings by dividing teams into impromptu "Fireteams".
Especially effective for larger groups.

* Update fnc_doGroupAssault.sqf

Make more gooder and not using not alias. Yes.

addons/main/functions/GroupAction/fnc_doGroupAssault.sqf

@@ -37,6 +37,7 @@ private _targetPos = _pos select 0;
     // get unit
     private _unit = _x;
     private _assaultPos = _targetPos;
+    if (((_forEachIndex % 4) isEqualTo 0) && {count _pos > 1}) then {_assaultPos = _pos select 1};
 
     // manoeuvre
     _unit forceSpeed 3;